86209457893 has 4 divisors (see below), whose sum is σ = 92840954668. Its totient is φ = 79577961120.

The previous prime is 86209457881. The next prime is 86209457921. The reversal of 86209457893 is 39875490268.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9670362244 + 76539095649 = 98338^2 + 276657^2 .

It is a cyclic number.

It is not a de Polignac number, because 86209457893 - 2³³ = 77619523301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86209457833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3315748368 + ... + 3315748393.

It is an arithmetic number, because the mean of its divisors is an integer number (23210238667).

Almost surely, 2^86209457893 is an apocalyptic number.

It is an amenable number.

86209457893 is a deficient number, since it is larger than the sum of its proper divisors (6631496775).

86209457893 is a wasteful number, since it uses less digits than its factorization.

86209457893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6631496774.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 86209457893 in words is "eighty-six billion, two hundred nine million, four hundred fifty-seven thousand, eight hundred ninety-three".